Is Chris Narveson a good add or is he just off to a good start?

I'm kind of having the same problem in my league. I've been contemplating picking Narveson up, but I'm afraid it might just be a hot start and nothing more than that. Personally, I like the pitchers you have right now better than Narveson, so I would just stay put. I can't justify dropping any of those players to pick up Chris. Good Luck!